摘要： //今天 DateTime.Now.Date.ToString(); //昨天 DateTime.Now.AddDays(-1).ToString(); //明天 DateTime.Now.AddDays(1).ToString(); //本週第1天及最後1天(要注意的是這裡的每一週是從週日始至週六止) DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek).ToString(); DateTime.Today.AddDays(6-(int)DateTime.Today.DayOfWeek).ToString(); //上週,一個周是7天, 阅读全文